Kaiser locks up while clearing the memory

[Raptylos]

Hello !

I wanted to reset my device to factory defaults over "settings - clear memory"
After a reboot, the phone locks up on the green windows logo while displaying "Clearing memory. Please wait" (translated - the german text is "Das Gerät löscht den Speicher. Bitte warten").

I tried Soft- and Hardreset.

Does anyone have a hint, how to solve this ?

Thanks in advance,
Norbert

/edit: WM6.1

/edit2: I get a new phone - memory was dead...